Questions
IO is a deep-reading environment for iPhone. It pairs five centuries of the canon with an interface engineered for immersion — card and reel modes that strip the page to a single unit of thought — and a set of AI personas built to challenge your reading rather than do it for you.
It is made for the reader who rereads: someone who wants to study a passage, not skim past it.
IO includes the full library, every reading mode, and 60 persona responses a month. IO+ unlocks the full practice: unlimited personas, AI search and discovery, and sync across devices.
No — by design. IO's personas are built to deepen your reading, not replace it. If you want the gist without the book, there are other tools.
IO is coming to iPhone first. With IO+, your place, highlights, and library stay in sync across the devices you sign in on. We will say more about iPad and other platforms as the work is ready — we would rather ship them right than ship them early.
From Project Gutenberg and Standard Ebooks — public-domain works in the careful, typeset editions those projects maintain. Austen to Aurelius, presented like a magazine and included with IO from the first open.
You can also bring your own: IO imports EPUB files and web articles, and everything stays DRM-free, with no lock-in.
Your library is yours. Translation runs on-device through Apple's Foundation Models, so passages you translate never leave your phone. Persona responses are generated server-side from the passage you send, and we do not sell your reading data or use it to build an advertising profile.
It depends on what you want from the reading. For carrying a large mixed library, Apple Books and Kindle are hard to beat. IO is built for a narrower thing done deeply: the classics, read closely — a reels view where a single paragraph fills the screen, a sentence-card mode that holds one line at a time, and twelve reading companions a fingertip away when a passage deserves more. The Gutenberg and Standard Ebooks editions are already on the shelf when you open it.
That is the design brief IO was built to. Its twelve companions — a Historian, a Critical Thinker, a Socratic Questioner among them — work on the passage in front of you: the moment it was written, the craft in the sentence, the question that tests whether you understood. They deepen the page; they never replace it.
